Fast charging harms every lithium-ion
battery. Charging and discharging lithium-
ion cells can lead to lithium plating. Lithium
ions are deposited on the anode surface
instead of nesting between the layers of
graphite. This effect leads to significant
losses in performance, service life and
safety. In extreme cases, lithium plating
can even lead to a short circuit or since
metallic lithium is highly flammable, to a
fire.

The smallest available wall charging stations
are connected to the 230 V/16 A household
mains supply. These wall charging stations
can only be used for single-phase charging
up to about 3.6 kW. This is only practical
in a few cases. For example, vehicles with
low battery capacity for short distances or
plug-in hybrids that do not rely exclusively
on the electric motor.

A large number of wall charging stations
for the private sector are connected to
400 V/16 A three-phase current (11 kW
max. charging capacity). Practically every
household offers this possibility without
additional changes to the power supply
system. This already reduces the charging
times by a factor of 3. The simple design of
these wall charging stations is particularly
advantageous, as in addition to 3-phase
charging, the standard on-board chargers
can also be operated at 230 V (max.
3.6 kW) on one phase without further
fusing.


Today, high-performance electronics
always means high-clocked circuits. And
these fast circuits always carry the risk of
excessive emissions of electromagnetic
interference signals, which must be
reduced. This problem can be overcome
with EMC filters with high attenuation
and a clever circuit board layout - in the
1-phase range usually even with discrete
components. SCHURTER has a wide
range of chassis mount filters for both
1-phase and 3-phase systems. Whether
1- or 2-stage filters are (must be) used
depends on the strength of the interference
signals, which should be measured in
advance. For almost any interference
signal and any power range, the problem
of electromagnetic compatibility can be
solved in a compact way.